<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.10/dist/vue.js"></script>
</head>

<body>
    <div id="app">
        <h1>水果</h1>
        <ul>
            <button @click="news.unshift({id:'04',content:'难过'})">增加</button>
        <li v-for="item,index of news" :key="item.id">
            <p>编号:{{item.id}}</p>
            <p>{{item.content}}</p>
        </li>
        </ul>       
    </div>
    <script>
        Vue.config.productionTip = false;
        
        const vm = new Vue({
            el: "#app",
            data() {
                return {
                    news:[
                        {id:"01",content:"开心"},
                        {id:"02",content:"悲伤"},
                        {id:"03",content:"快乐"}

                    ],
                }
            }
        })
</script>
</body>

</html>